diff --git a/create_test_dvds.sh b/create_test_dvds.sh
old mode 100644
new mode 100755
index 571d2a41..675ef308
--- a/create_test_dvds.sh
+++ b/create_test_dvds.sh
@@ -69,7 +69,11 @@ function sync_prj() {
     dir=$2
     mkdir -p $dir
     perl $SCRIPTDIR/bs_mirrorfull --nodebug https://build.opensuse.org/build/$prj/x86_64 $dir
-    rpms2solv $dir/*.rpm > $dir.solv
+    if [ "$dir" -nt "$dir.solv" ]; then
+	    local start=$SECONDS
+	    rpms2solv $dir/*.rpm > $dir.solv
+	    echo "creating ${dir}.solv took $((SECONDS-$start))s"
+    fi
 }
 
 function start_creating() {